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EV0042 Folha de dados(PDF) 1 Page - Monolithic Power Systems

Nome de Peças EV0042
Descrição Electrónicos  1x, 1.5x, 2x High Efficiency Charge Pump 4 White LED Driver Evaluation Board
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Fabricante Electrônico  MPS [Monolithic Power Systems]
Página de início  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

EV0042 Folha de dados(HTML) 1 Page - Monolithic Power Systems

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EV0042
1x, 1.5x, 2x High Efficiency Charge Pump
4 White LED Driver Evaluation Board
EV0042 Rev. 1.5
www.MonolithicPower.com
1
10/27/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
The Future of Analog IC Technology
TM
TM
GENERAL DESCRIPTION
The EV0042 is an evaluation board for the
MP1519, a fully automatic driver for powering
four white LEDs, with up to 4V forward voltage,
from a single Li-Ion or three NiMH cells. The
driver performs all of the sensing and control to
run the LEDs at an optimum charge pump ratio
for efficiency without an expensive inductor.
The driver allows PWM operation to support
brightness control.
The tiny 3mm x 3mm QFN16 package and
small external capacitors allow for the most
compact white LED solution available.
ELECTRICAL SPECIFICATIONS
Parameter
Symbol
Value
Units
# of WLEDs
4
Input Voltage
VIN
2.5 – 5.5
V
LED Current
ILED
20
mA
FEATURES
• 2% LED Current Matching
• High Efficiency (>93%)
• Current Source Outputs
• No Ballast Resistors Required
• 1x, 1.5x and 2x Automatic Modes
• Constant Frequency Operation
• Automatic LED Detection
• High and Low Frequency PWM Capability
• 2.5V to 5.5V Operation
• Less than 1µA Leakage during Shutdown
• Detects Changes in Battery Level
• No External Schottky Diode Required
• Soft-Start and Soft Switching Operation
APPLICATIONS
• Cell Phones
• PDA or Hand Held Computers
• White LED Application at 3.6V Supply
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
EV0042 EVALUATION BOARD
(L x W x H) 2.4” x 1.9” x 0.4”
(6.1cm x 4.8cm x 1.0cm)
Board Number
MPS IC Number
EV0042
MP1519DQ
100
90
80
70
60
50
40
30
20
10
0
2.5
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
MP1519-EC01
Efficiency vs
Supply Voltage
VLED = 3.35V @ 20mA
ILED=20mA
ILED=10mA
ILED=5mA


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